6561578484 has 36 divisors (see below), whose sum is σ = 17459172640. Its totient is φ = 2072077200.

The previous prime is 6561578461. The next prime is 6561578509. The reversal of 6561578484 is 4848751656.

6561578484 is a `hidden beast` number, since 6 + 5 + 6 + 157 + 8 + 484 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 6561578484.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4795792 + ... + 4797159.

Almost surely, 2^6561578484 is an apocalyptic number.

It is an amenable number.

6561578484 is an abundant number, since it is smaller than the sum of its proper divisors (10897594156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6561578484 is a wasteful number, since it uses less digits than its factorization.

6561578484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9592980 (or 9592975 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 6561578484 is about 81003.5708101810. The cubic root of 6561578484 is about 1872.1304594869.

The spelling of 6561578484 in words is "six billion, five hundred sixty-one million, five hundred seventy-eight thousand, four hundred eighty-four".